Laser cutting corner structure for BGA security plate processing

Abstract

The invention discloses a laser cutting corner structure for BGA security plate machining, and relates to the field of security plate machining. A laser cutting corner structure for BGA security plate machining comprises a base and further comprises supporting plates symmetrically and fixedly connected to the two sides of the base. The lifting plate is arranged between the two supporting plates; the first driving part is used for driving the lifting plate to lift and is mounted on the base; the safety protection plate is clamped and positioned through the limiting disc and the first tensioning spring, the stability of the safety protection plate in the cutting process is ensured, the problem of excessive cutting or insufficient cutting caused by inaccurate mounting positions is avoided, meanwhile, corner turning of the safety protection plate is achieved by rotating the containing disc during corner turning, and the safety protection plate is more convenient to use. According to the laser cutting device, workers do not need to manually and frequently disassemble and assemble the security plate and adjust the position of the security plate, the disassembly and assembly time is shortened, the laser cutting head can continuously conduct cutting work through automatic turning operation, the cutting period is greatly shortened, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of security board processing, and specifically relates to a laser cutting corner structure for BGA security board processing. Background Art

[0002] In modern security, BGA security boards are widely used in various security monitoring devices due to their advantages such as high integration and stable performance. With the continuous improvement of the security industry's requirements for product performance and quality, more stringent standards have been put forward for the processing accuracy and quality of BGA security boards. As a high-precision and non-contact processing method, laser cutting technology has been increasingly used in the processing of BGA security boards. Especially when cutting the corners of security boards, laser cutting can achieve relatively fine processing.

[0003] However, when the existing laser cutting machines cut the corners of BGA security boards, their laser cutting heads usually can only perform straight-line cutting in a single direction. When it is necessary to cut the other side after completing the cutting of one side of the security board, the problem of the corner of the security board is faced. In the previous operation mode, this corner process often relies on manual operation by workers, that is, the workers need to disassemble the security board from the cutting equipment, readjust the direction and then install it on the equipment for cutting. This manual operation process not only consumes a lot of time and greatly reduces production efficiency, but also because the position of the security board needs to be readjusted every time it is disassembled and installed. Once there is a deviation in the installation position, even an extremely small error may lead to serious problems such as over-cutting or under-cutting of the security board during subsequent cutting, thereby seriously affecting the processing quality of BGA security boards, increasing the scrap rate and raising production costs.

[0004] In summary, the existing laser cutting technology has serious deficiencies in terms of processing quality and production efficiency when cutting the corners of BGA security boards, and it is difficult to meet the growing high-quality and high-efficiency processing requirements of the current security industry for BGA security boards. In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a laser cutting corner structure for BGA security board processing that can overcome the above problems or at least partially solve the above problems.

[0006] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A laser cutting corner structure for processing a BGA security board, including a base, further including: support plates symmetrically and fixedly connected to both sides of the base; a lifting plate disposed between the two support plates; a first driving part for driving the lifting plate to lift, installed on the base; a second motor fixedly connected to the middle position of the bottom of the lifting plate; a placement groove is formed on the lifting plate; a placement disk rotatably disposed in the placement groove, and the output end of the second motor is fixedly connected to the bottom of the placement disk; a fixing plate fixedly connected between the two support plates and located above the placement disk; a T-shaped rod vertically slidably connected to the fixing plate; a limiting disk rotatably connected to the lower end of the T-shaped rod through a bearing; a first tension spring sleeved on the T-shaped rod and having two ends respectively abutted against the fixing plate and the bearing; a laser cutting head disposed on one side of the fixing plate; a second driving part for controlling the movement of the laser cutting head, installed between the two support plates.

[0007] Further, the first driving part includes fixing blocks, a bidirectional lead screw, a first motor, first sliders, and adjusting rods. The fixing blocks are symmetrically and fixedly connected to the base. The bidirectional lead screw is rotatably connected between the two fixing blocks. The first motor is fixedly connected to one of the fixing blocks, and the output end of the first motor is fixedly connected to the adjacent end of the bidirectional lead screw. The first sliders are symmetrically slidably connected to the base and are threadedly connected to the bidirectional lead screw. The adjusting rods are symmetrically rotatably connected to the first sliders through first hinge seats. The ends of the adjusting rods away from the first sliders are rotatably connected to the bottom of the lifting plate through second hinge seats.

[0008] Further, the second driving part includes a mounting plate, a fourth motor, a second lead screw, and a third slider. The mounting plate is disposed above the position between the two support plates. The fourth motor is fixedly connected to one side of the mounting plate. The second lead screw is fixedly connected to the output end of the fourth motor. The end of the second lead screw away from the fourth motor is rotatably connected to the mounting plate. The third slider is slidably connected to the mounting plate and is threadedly connected to the second lead screw. The laser cutting head is installed on the third slider.

[0009] In order to facilitate the real-time fine-tuning of the position of the laser cutting head according to the actual cutting situation during the processing, further, it further includes a support plate, a first lead screw, a third motor, and a second slider. The support plates are symmetrically and fixedly connected to the upper ends of the support plates. The first lead screw is rotatably connected between two support plates on the same side. The third motor is fixedly connected to one of the support plates. The output end of the third motor is fixedly connected to the end of the adjacent first lead screw. The second slider is threadedly connected to the first lead screw and is in sliding contact with the support plate. The mounting plate is fixedly connected between the two second sliders. Both ends of the two first lead screws away from the third motor are fixedly connected with sprockets, and the two sprockets are connected by a chain.

[0010] In order to facilitate the smoother movement of the first slider and the second slider, further, a plurality of first balls are embedded at the bottom of the first slider, and the first balls are in rolling contact with the base. A plurality of second balls are embedded at the bottom of the placement plate, and the second balls are in rolling contact with the bottom of the placement groove.

[0011] In order to prevent scratches and abrasions on the surface of the security plate and avoid affecting its performance due to surface damage of the plate and ensure product quality, further, a plurality of rubber protrusions are fixedly connected at equal circumferential intervals on the surfaces of the placement plate adjacent to the limit plate.

[0012] In order to facilitate the pre-clamping and fixing of the security plate, further, the rubber protrusions on the limit plate and the rubber protrusions on the placement plate are mutually attached under the action of the first tension spring.

[0013] In order to facilitate the grinding treatment of the corners of the security plate, further, a cylinder is horizontally fixedly connected to one side of the lifting plate. A piston is slidably connected in the cylinder. One side of the piston close to the placement plate is fixedly connected with a connecting rod. The end of the connecting rod extending out of the cylinder is fixedly connected with a moving plate. A grinding plate is installed on one side of the moving plate close to the placement plate. One side of the piston away from the connecting rod is fixedly connected with a second tension spring, and the end of the second tension spring away from the piston is fixedly connected with the cylinder.

[0014] In order to facilitate the blowing away of the debris generated during the grinding process by the airflow ejected from the air nozzles when the grinding plate grinds the corners of the security plate, avoid the accumulation of debris in the grinding area, prevent the debris from scratching the surface of the security plate again, ensure the smooth progress of grinding, and improve the grinding quality, further, a spray pipe is fixedly connected to the upper end of the moving plate. A plurality of air nozzles are equidistantly connected to the side of the spray pipe close to the placement plate. The air outlet surface of the air nozzles is arranged downward. The spray pipe is connected to the air outlet of the cylinder through a connecting air pipe.

[0015] In order to facilitate avoiding the problem of damaging the security board due to excessive clamping or displacement of the security board during cutting due to insufficient clamping, further, a rangefinder is fixedly connected to the lifting plate, and the detection end of the rangefinder faces the fixed plate.

[0016] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention clamps and positions the security board through the limit disc and the first tension spring, ensuring the stability of the security board during the cutting process, avoiding the problem of over-cutting or under-cutting caused by inaccurate installation position. At the same time, during the cornering, the security board is rotated by rotating the placement disc, eliminating the need for workers to manually disassemble, install and adjust the position of the security board frequently, reducing a large amount of disassembly and installation time. Through the automated cornering operation, the laser cutting head can continuously perform cutting work, greatly shortening the cutting cycle, improving production efficiency, and reducing production costs.

[0017] The following further describes in detail the specific implementation manners of the present invention with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the drawings:

[0019] Figure 1 is a schematic structural view of the present invention;

[0020] Figure 2 is a top view structural schematic of the second driving part in the present invention;

[0021] Figure 3 is a structural schematic of the first slider, the first hinge seat and the first ball in the present invention;

[0022] Figure 4 is a structural schematic of the lifting plate, the placement disc, the cylinder, the air jet pipe and the connecting air pipe in the present invention;

[0023] Figure 5 is the present invention Figure 1 a structural schematic of part A in;

[0024] Figure 6 is the present invention Figure 1 a structural schematic of part B in.

[0025] In the figure: 1, base; 101, fixed block; 102, bidirectional lead screw; 103, first motor; 104, first slider; 105, adjusting rod; 106, first ball; 107, support plate; 2, lifting plate; 201, second motor; 202, placing plate; 203, second ball; 204, distance measuring instrument; 3, fixing plate; 301, T-shaped rod; 302, first tension spring; 303, limiting disc; 4, rubber bulge; 5, support plate; 501, first lead screw; 502, third motor; 503, second slider; 504, mounting plate; 505, sprocket; 506, chain; 507, fourth motor; 508, second lead screw; 509, third slider; 6, laser cutting head; 7, air cylinder; 701, piston; 702, second tension spring; 703, connecting rod; 704, moving plate; 705, grinding plate; 706, air jet pipe; 707, air jet nozzle; 708, connecting air pipe. Specific embodiments

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0027] Embodiment 1:

[0028] Referring to Figures 1-6 , a laser cutting corner structure for BGA security board processing, including a base 1, further including: support plates 107 symmetrically and fixedly connected to both sides of the base 1; a lifting plate 2 disposed between the two support plates 107; a first driving portion for driving the lifting plate 2 to lift, mounted on the base 1; a second motor 201 fixedly connected to the middle position of the bottom of the lifting plate 2; a placement groove is formed on the lifting plate 2; a placing plate 202 rotates in the placement groove, and the output end of the second motor 201 is fixedly connected to the bottom of the placing plate 202; a fixing plate 3 is fixedly connected between the two support plates 107 and is located above the placing plate 202; a T-shaped rod 301 is vertically slidably connected to the fixing plate 3; a limiting disc 303 is rotatably connected to the lower end of the T-shaped rod 301 through a bearing; a first tension spring 302 is sleeved on the T-shaped rod 301, and both ends are respectively abutted against the fixing plate 3 and the bearing; a laser cutting head 6 is disposed on one side of the fixing plate 3; a second driving portion for controlling the movement of the laser cutting head 6 is mounted between the two support plates 107.

[0029] The first driving part includes a fixed block 101, a bidirectional lead screw 102, a first motor 103, a first slider 104 and an adjusting rod 105. The fixed block 101 is symmetrically and fixedly connected to the base 1. The bidirectional lead screw 102 is rotatably connected between the two fixed blocks 101. The first motor 103 is fixedly connected to one of the fixed blocks 101. The output end of the first motor 103 is fixedly connected to the adjacent end of the bidirectional lead screw 102. The first sliders 104 are symmetrically and slidably connected to the base 1 and are threadedly connected to the bidirectional lead screw 102. The adjusting rods 105 are symmetrically and rotatably connected to the first sliders 104 through first hinge seats. The ends of the adjusting rods 105 far from the first sliders 104 are rotatably connected to the bottom of the lifting plate 2 through second hinge seats.

[0030] The second driving part includes a mounting plate 504, a fourth motor 507, a second lead screw 508 and a third slider 509. The mounting plate 504 is arranged above the position between the two support plates 107. The fourth motor 507 is fixedly connected to one side of the mounting plate 504. The second lead screw 508 is fixedly connected to the output end of the fourth motor 507. The end of the second lead screw 508 far from the fourth motor 507 is rotatably connected to the mounting plate 504. The third slider 509 is slidably connected to the mounting plate 504 and is threadedly connected to the second lead screw 508. The laser cutting head 6 is installed on the third slider 509.

[0031] When laser cutting operation is needed for the edge of the BGA security board, the BGA security board to be processed is placed flat on the placing plate 202. The placing plate 202 is located in the placing groove of the lifting plate 2 and can rotate flexibly under the drive of the second motor 201. When placing the security board, the operator needs to roughly align the center of the security board with the center of the placing plate 202 to ensure that the security board will not shake due to the center of gravity deviation during the subsequent processing.

[0032] After the preliminary placement, the operator can manually fine-tune the position of the security board on the placing plate 202 to make the edge of the security board to be cut roughly parallel to the subsequent moving path of the laser cutting head 6, so as to prepare for subsequent precise positioning and cutting. At this time, the security board is only placed on the placing plate 202 and has not been fixed yet.

[0033] After adjusting the position of the security board, the first driving part can be started. At this time, the first motor 103 fixed on the base 1 starts to work. The output shaft of the first motor 103 drives the bidirectional lead screw 102 to rotate. During the rotation of the bidirectional lead screw 102, the first slider 104 threadedly connected to it slides symmetrically on the base 1 along a specific track. Since one end of the adjusting rod 105 is rotatably connected to the first slider 104 through the first hinge seat and the other end is rotatably connected to the bottom of the lifting plate 2 through the second hinge seat, as the first slider 104 slides, the adjusting rod 105 pushes the lifting plate 2 to rise smoothly. As the lifting plate 2 rises, the limiting disk 303 at the lower end of the T-shaped rod 301 fixedly connected to the fixing plate 3 and vertically slidably connected gradually approaches the upper surface of the security board. When the limiting disk 303 contacts the upper surface of the security board, the lifting plate 2 continues to rise. At this time, the T-shaped rod 301 starts to slide upward on the fixing plate 3, compressing the first tension spring 302 sleeved on the T-shaped rod 301. The first tension spring 302 is compressed to generate elastic deformation, and its two ends respectively apply pressure to the fixing plate 3 and the bearing connected to the limiting disk 303, so that the limiting disk 303 tightly presses on the upper surface of the security board, thereby firmly clamping the security board between the limiting disk 303 and the placement disk 202, completing precise positioning and fixing, and ensuring that the security board will not be displaced during the cutting process.

[0034] After the security board is clamped and positioned, the laser cutting head 6 is turned on. The laser cutting head 6 emits a laser beam with a high energy density to prepare for cutting the security board. Then the second driving part is started. The fourth motor 507 fixed on one side of the mounting plate 504 operates. The output shaft of the fourth motor 507 drives the second lead screw 508 fixedly connected to it to rotate. During the rotation of the second lead screw 508, the third slider 509 threadedly connected to it slides on the mounting plate 504 along a preset track. Since the laser cutting head 6 is mounted on the third slider 509, the sliding of the third slider 509 drives the laser cutting head 6 to move along a set path. The laser beam acts on the edge of the security board, instantly melting or vaporizing the plate material, thereby realizing the cutting operation on one side of the security board. During the cutting process, according to parameters such as the material and thickness of the security board, the rotation speed of the fourth motor 507 can be adjusted through the control system, and then the moving speed of the laser cutting head 6 can be precisely controlled to ensure the cutting quality.

[0035] After the cutting of one side of the security board is completed, the control system issues an instruction to stop the fourth motor 507 from running, stop the movement of the laser cutting head 6, and at the same time, the laser cutting head 6 pauses the emission of the laser beam. At this time, in order to perform the corner operation of the security board, it is necessary to first ensure that the cutting process has completely stopped to avoid unnecessary damage to the security board during the cornering process. Then, start the second motor 201. The output end of the second motor 201 is fixedly connected to the bottom of the placement plate 202. Therefore, when the second motor 201 rotates, it drives the placement plate 202 to rotate in the placement groove of the lifting plate 2. The rotation of the placement plate 202 drives the security board to rotate synchronously. According to the preset corner angle, such as 90 degrees, the security board is rotated to a position where the next edge to be cut is parallel to the movement path of the laser cutting head 6. During the rotation process, the rotation speed and corner accuracy of the second motor 201 can be accurately controlled by the control system to ensure that the security board can be accurately rotated to the predetermined angle.

[0036] After the corner of the security board is completed, start the laser cutting head 6 to emit the laser beam again, and at the same time, the fourth motor 507 runs again to drive the laser cutting head 6 to move and cut the new side of the security board. Repeat the steps of the above single-side cutting and corner operation until all the sides of the security board that need to be cut are completed. When all the sides of the security board are cut, start the first driving part again, the first motor 103 rotates in reverse, the bidirectional lead screw 102 rotates in the opposite direction accordingly, the first slider 104 slides in the opposite direction, drives the adjusting rod 105 to lower the lifting plate 2. As the lifting plate 2 descends, the limiting disk 303 separates from the security board, and the first tension spring 302 returns to its original state. At this time, the operator can easily take out the cut BGA security board from the placement plate 202 to complete the entire processing process.

[0037] It should be noted that the BGA security board processed in this embodiment is square, so there is no need to adjust the front and rear positions of the laser cutting head 6.

[0038] This structure clamps and positions the security board through the limiting disk 303 and the first tension spring 302, ensuring the stability of the security board during the cutting process and avoiding the problems of over-cutting or under-cutting caused by inaccurate installation positions. At the same time, during the cornering, the corner of the security board is realized by rotating the placement plate 202, eliminating the need for the staff to manually disassemble, install, and adjust the position of the security board frequently, reducing a large amount of disassembly and installation time. Through the automated corner operation, the laser cutting head 6 can continuously perform cutting work, greatly shortening the cutting cycle, improving production efficiency, and reducing production costs.

[0039] The operation process of this structure is simple and easy to understand. By controlling the rotation of each motor, operations such as the positioning, cutting, and cornering of the security board can be achieved, reducing the labor intensity and technical requirements of the operator and improving the usability of the equipment.

[0040] Example 2:

[0041] Referring to Figures 1-6 , a laser cutting corner structure for BGA security board processing is basically the same as that in Embodiment 1. Furthermore, it further includes a support plate 5, a first screw rod 501, a third motor 502 and a second slider 503. The support plate 5 is symmetrically and fixedly connected to the upper end of the support plate 107. The first screw rod 501 is rotatably connected between two support plates 5 on the same side. The third motor 502 is fixedly connected to one of the support plates 5. The output end of the third motor 502 is fixedly connected to the end of the adjacent first screw rod 501. The second slider 503 is threadedly connected to the first screw rod 501 and is in sliding contact with the support plate 107. The mounting plate 504 is fixedly connected between the two second sliders 503. A sprocket 505 is fixedly connected to one end of each of the two first screw rods 501 away from the third motor 502. The two sprockets 505 are connected by a chain 506.

[0042] In the laser cutting corner structure for BGA security board processing, the newly added components such as the support plate 5, the first screw rod 501, the third motor 502 and the second slider 503 constitute a flexible and practical adjustment system, which provides strong support for meeting the processing requirements of security boards of different sizes, especially showing significant benefits in adjusting the front and rear positions of the laser cutting head 6.

[0043] First of all, this structure can easily handle security boards of different sizes. In the actual production process of BGA security boards, the size specifications of security boards are often diverse. Traditional laser cutting equipment is difficult to quickly adapt to such size changes. It may be necessary to replace specific tooling fixtures or perform complex equipment adjustments, which is time-consuming and laborious. However, this new structure can achieve the adaptation to security boards of different sizes through simple operations. When facing security boards of different sizes, just start the third motor 502. The output end of the third motor 502 drives the first screw rod 501 to rotate. Since the second slider 503 is threadedly connected to the first screw rod 501 and is in sliding contact with the support plate 107, when the first screw rod 501 rotates, the second slider 503 will slide along the direction of the support plate 107. The two second sliders 503 move synchronously under the drive of the two first screw rods 501 respectively, and then drive the mounting plate 504 fixedly connected between them to move back and forth. Because the laser cutting head 6 is installed on the mounting plate 504, the movement of the mounting plate 504 can accurately adjust the position of the laser cutting head 6 in the front and rear directions, so as to ensure that the laser cutting head 6 can accurately align the parts to be cut of security boards of different sizes, without the need to replace equipment components tediously or perform complex recalibration, greatly improving the versatility and processing efficiency of the equipment for security boards of different sizes.

[0044] Secondly, in terms of adjusting the front - rear position of the laser cutting head 6, this structure has extremely high precision and convenience. By controlling the rotation angle and speed of the third motor 502, the rotation amount of the first lead screw 501 can be accurately controlled. Furthermore, the moving distance of the second slider 503 and the mounting plate 504 can be precisely adjusted to achieve accurate adjustment of the position of the laser cutting head 6. Moreover, sprockets 505 are fixedly connected to the ends of the two first lead screws 501 far from the third motor 502, and the two sprockets 505 are connected by a chain 506. This transmission method ensures that the two first lead screws 501 can rotate synchronously, making the mounting plate 504 always remain stable during movement without tilting or jamming, further ensuring the accuracy and stability of the position adjustment of the laser cutting head 6. This precise and convenient adjustment method can not only improve the processing accuracy of security plates of different sizes but also fine - tune the position of the laser cutting head 6 in real - time according to the actual cutting situation during the processing, ensuring the consistency and stability of the cutting quality, effectively avoiding cutting defects caused by inaccurate position of the laser cutting head 6, such as cutting line deviation, over - cutting or under - cutting, etc., greatly improving the processing quality and production efficiency of BGA security plates.

[0045] Embodiment 3:

[0046] Refer to Figures 1-6 , a laser cutting corner structure for BGA security plate processing, which is basically the same as Embodiment 2. Further, a plurality of first balls 106 are embedded at the bottom of the first slider 104, and the first balls 106 are in rolling contact with the base 1. A plurality of second balls 203 are embedded at the bottom of the placement plate 202, and the second balls 203 are in rolling contact with the bottom of the placement groove.

[0047] The first balls 106 play a key role between the first slider 104 and the base 1. When the first motor 103 drives the bidirectional lead screw 102 to rotate and drives the first slider 104 to slide on the base 1, the first balls 106 are in rolling contact with the base 1, converting the original sliding friction into rolling friction. Compared with sliding friction, the friction coefficient of rolling friction is greatly reduced. This makes the movement of the first slider 104 smoother and more efficient. During the actual processing, it can significantly reduce the driving force required for the movement of the first slider 104, reduce the energy consumption of the first motor 103, and extend the service life of the motor. At the same time, due to the reduction of friction, the jamming phenomenon of the first slider 104 during movement is eliminated, ensuring the smooth rise and fall of the lifting plate 2, and thus ensuring the stability of the security plate during the clamping and positioning process, which is beneficial to improving the processing accuracy. Moreover, rolling friction can also effectively reduce the wear between the first slider 104 and the base 1, reduce the maintenance cost of the equipment, and improve the overall reliability and durability of the equipment.

[0048] The second ball 203 is also of great significance between the placement plate 202 and the bottom of the placement groove. When the second motor 201 drives the placement plate 202 to rotate in the placement groove for the corner operation of the security plate, the second ball 203 rolls and adheres to the bottom of the placement groove, realizing low-friction rotation. This makes the rotation of the placement plate 202 more flexible and easy, and can quickly and accurately rotate the security plate to the predetermined angle. Compared with the traditional direct-contact rotation method, the presence of the second ball 203 greatly reduces the resistance during rotation, reduces the load on the second motor 201, and reduces the wear and energy consumption of the motor. At the same time, due to the more stable rotation, it can effectively avoid the cutting error caused by the shaking or position deviation of the security plate during the corner process, further improving the processing quality. In addition, the rolling friction of the second ball 203 can also reduce the wear between the placement plate 202 and the bottom of the placement groove, extend the service life of related components, and improve the operation stability and reliability of the equipment.

[0049] Embodiment 4:

[0050] Referring to Figures 1-6 , a laser cutting corner structure for BGA security plate processing is basically the same as that in Embodiment 3. Furthermore, a plurality of rubber protrusions 4 are fixedly connected to the adjacent surfaces of the placement plate 202 and the limit plate 303 at equal circumferential intervals. These rubber protrusions 4 greatly enhance the clamping stability of the security plate. When the limit plate 303 presses the security plate under the action of the first tension spring 302, the rubber protrusions 4 closely fit the surface of the security plate by virtue of their own elasticity, increasing the contact area and friction force, effectively preventing the security plate from shifting due to the laser impact force or the rotation of the placement plate 202 during the cutting process, ensuring the cutting accuracy. At the same time, the rubber protrusions 4 also play a role in protecting the security plate. The BGA security plate is relatively precise and its surface is easily damaged. The rubber material is soft, which can avoid scratching and scuffing the surface of the security plate caused by hard contact, prevent the performance of the plate from being affected due to surface damage, and ensure the product quality. In addition, the rubber protrusions 4 are distributed at equal circumferential intervals, which can make the pressure act on the security plate evenly, further improving the clamping stability and protection effect.

[0051] The rubber protrusions 4 on the limit plate 303 and the rubber protrusions 4 on the placement plate 202 are mutually attached under the action of the first tension spring 302. In this laser cutting corner structure, the rubber protrusions 4 on the limit plate 303 and the placement plate 202 are mutually attached under the action of the first tension spring 302, which has an important preliminary fixing effect on the security plate. When the security plate is placed on the placement plate 202, as the limit plate 303 approaches under the spring pressure, the rubber protrusions 4 on both sides are mutually attached, and stable pressure can be applied to the security plate from the upper and lower directions. This preliminarily restricts the security plate to a fixed position before the formal cutting, effectively avoiding the shaking caused by the startup and movement of the equipment, providing a stable basis for subsequent precise cutting, and greatly improving the processing accuracy and efficiency.

[0052] Example 5:

[0053] Referring to Figures 1-6 , a laser cutting corner structure for BGA security board processing, which is basically the same as that in Example 4. Furthermore, a cylinder 7 is horizontally fixedly connected to one side of the lifting plate 2. A piston 701 is slidably connected in the cylinder 7. One side of the piston 701 close to the placing plate 202 is fixedly connected with a connecting rod 703. One end of the connecting rod 703 extending out of the cylinder 7 is fixedly connected with a moving plate 704. A grinding plate 705 is installed on one side of the moving plate 704 close to the placing plate 202. One side of the piston 701 away from the connecting rod 703 is fixedly connected with a second tension spring 702. One end of the second tension spring 702 away from the piston 701 is fixedly connected with the cylinder 7. When the security board rotates driven by the placing plate 202, this structure can timely grind the corner of the security board accordingly. The cylinder 7 is fixed on one side of the lifting plate 2, providing a stable installation basis for the whole grinding structure. During the rotation of the security board, the sliding of the piston 701 in the cylinder 7 enables the grinding plate 705 to approach or move away from the security board. The second tension spring 702 connects the piston 701 and the cylinder 7 and plays a key role in the grinding process. It always provides a elastic force towards the security board for the piston 701, ensuring that the grinding plate 705 can continuously and stably fit on the corner of the security board, guaranteeing the consistency of the grinding effect. As the security board rotates, the grinding plate 705 grinds the corner in all directions. This design effectively solves the problems such as burrs and unevenness often appearing at the corners of the security board after laser cutting. Grinding is carried out synchronously during the rotation of the security board, without the need to set up a special grinding process additionally, greatly saving the processing time and improving the production efficiency. Moreover, since the grinding is carried out at the first time after the security board is cut, the material state at the corner is relatively stable at this time, which is more conducive to grinding treatment, can obtain a better grinding effect, improve the surface quality and overall processing accuracy of the security board, and meet the strict requirements of the security industry for high-quality products.

[0054] The upper end of the moving plate 704 is fixedly connected with an air jet pipe 706. On the side of the air jet pipe 706 close to the placement plate 202, a plurality of air jet nozzles 707 are equidistantly connected. The air outlet surface of the air jet nozzles 707 is arranged downward. The air jet pipe 706 is connected to the air outlet of the air cylinder 7 through a connecting air pipe 708. The air jet pipe 706 is connected to the air outlet of the air cylinder 7 through the connecting air pipe 708, making clever use of the airflow generated during the operation of the air cylinder 7. During the grinding process of the security plate, the air outlet of the air cylinder 7 provides power for the air jet pipe 706. A plurality of air jet nozzles 707 equidistantly connected on the side of the air jet pipe 706 close to the placement plate 202, and the air outlet surface is arranged downward, enabling the airflow to act precisely on the grinding area of the security plate. When the grinding plate 705 grinds the corners of the security plate, the airflow ejected by the air jet nozzles 707 can assist the grinding work. The strong airflow can blow away the debris generated during the grinding process, preventing the debris from accumulating in the grinding area and avoiding the secondary scratching of the surface of the security plate by the debris, ensuring the smooth progress of grinding and improving the grinding quality. Moreover, the airflow can reduce the temperature of the grinding area. Heat will be generated due to friction during the grinding process, and too high a temperature may affect the material performance of the security plate. The cooling effect of the airflow can effectively avoid this situation and ensure the stable performance of the security plate during the processing. In addition, using the waste gas of the air cylinder 7 to drive the air jet pipe 706 eliminates the need for additional air supply equipment, simplifies the equipment structure, reduces costs and energy consumption, and improves the overall operation efficiency and economy of the equipment.

[0055] A distance measuring instrument 204 is fixedly connected to the lifting plate 2. The detection end of the distance measuring instrument 204 faces the fixed plate 3. When the first driving part is started, the lifting plate 2 rises, driving the security plate close to the limit plate 303 below the fixed plate 3. During this process, the distance measuring instrument 204 continuously monitors the distance between the lifting plate 2 and the fixed plate 3. Since the limit plate 303 is connected to the fixed plate 3, and the security plate is placed on the placement plate 202 on the lifting plate 2, the change in this distance indirectly reflects the proximity of the security plate to the limit plate 303. Through a preset safety distance threshold, when the distance feedback by the distance measuring instrument 204 approaches this threshold, the control system will adjust the rotation speed of the first motor 103 in the first driving part to slow down the rising speed of the lifting plate 2. As the security plate gets closer to the limit plate 303, the distance measuring instrument 204 continuously monitors. When the distance reaches the set optimal clamping distance, the control system precisely controls the first motor 103 to stop running, ensuring that the limit plate 303 presses the security plate with just the right force under the action of the first tension spring 302. This method of controlling the clamping force by monitoring the distance with the distance measuring instrument 204 avoids the problems of damaging the security plate due to over-tight clamping or the displacement of the security plate during cutting due to over-loose clamping. Whether facing security plates of different thicknesses or in the case of component wear during long-term operation of the equipment, it can ensure that the clamping force is always appropriate, providing a stable processing basis for laser cutting and effectively improving the processing accuracy and product quality of the BGA security plate.

[0056] The above are only the preferred embodiments of the present invention, and there is no limitation to the present invention in any form. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention.

Claims

1. A laser cutting corner structure for BGA security board processing, characterized in that: The invention comprises a base (1), and further comprises: Support plates (107) symmetrically fixedly connected to two sides of the base (1); A lifting plate (2) is arranged between the two support plates (107); A first driving unit for driving the lifting plate (2) to move up and down, mounted on the base (1); A second motor (201) is fixedly connected to a middle position of the bottom of the lifting plate (2); The lifting plate (2) is provided with a placement groove; A placement plate (202) rotates in the placement slot, and an output end of the second motor (201) is fixedly connected to the bottom of the placement plate (202); A fixed plate (3) fixedly connected between the two support plates (107) and located above the placement plate (202); A T-shaped rod (301) vertically slidably connected to the fixing plate (3); The limiting plate (303) is rotatably connected to the lower end of the T-shaped rod (301) through a bearing; A first tensioning spring (302) is sleeved on the T-shaped rod (301), and two ends thereof are respectively against the fixing plate (3) and the bearing; A laser cutting head (6) is arranged on one side of the fixing plate (3); A second driving unit for controlling the movement of the laser cutting head (6) is installed between the two support plates (107).

2. The laser cutting corner structure for BGA security board processing according to claim 1 is characterized in that: The first driving part comprises a fixed block (101), a bidirectional screw rod (102), a first motor (103), a first slider (104) and an adjusting rod (105); the fixed block (101) is symmetrically fixedly connected to the base (1); the bidirectional screw rod (102) is rotatably connected between the two fixed blocks (101); the first motor (103) is fixedly connected to one of the fixed blocks (101); the output end of the first motor (103) is fixedly connected to the end adjacent to the bidirectional screw rod (102); the first slider (104) is symmetrically slidably connected to the base (1) and is threadedly connected to the bidirectional screw rod (102); the adjusting rod (105) is symmetrically rotatably connected to the first slider (104) via a first hinge seat; and one end of the adjusting rod (105) away from the first slider (104) is rotatably connected to the bottom of the lifting plate (2) via a second hinge seat.

3. The laser cutting corner structure for BGA security board processing according to claim 1, characterized in that: The second driving part comprises a mounting plate (504), a fourth motor (507), a second screw rod (508) and a third slider (509); the mounting plate (504) is arranged at an upper position between the two support plates (107); the fourth motor (507) is fixedly connected to one side of the mounting plate (504); the second screw rod (508) is fixedly connected to the output end of the fourth motor (507); an end of the second screw rod (508) away from the fourth motor (507) is rotatably connected to the mounting plate (504); the third slider (509) is slidably connected to the mounting plate (504) and is threadedly connected to the second screw rod (508); and the laser cutting head (6) is mounted on the third slider (509).

4. The laser cutting corner structure for BGA security board processing according to claim 3 is characterized in that: The invention also comprises a support plate (5), a first screw rod (501), a third motor (502) and a second slider (503), wherein the support plate (5) is symmetrically fixedly connected to the upper end of the support plate (107), the first screw rod (501) is rotatably connected between two support plates (5) located on the same side, the third motor (502) is fixedly connected to one of the support plates (5), the output end of the third motor (502) is fixedly connected to the end of the adjacent first screw rod (501), the second slider (503) is threadedly connected to the first screw rod (501) and slides against the support plate (107), the mounting plate (504) is fixedly connected between the two second sliders (503), and one end of the two first screw rods (501) away from the third motor (502) is fixedly connected to a sprocket (505), and the two sprockets (505) are connected by a chain (506).

5. The laser cutting corner structure for BGA security board processing according to claim 2, characterized in that: A plurality of first balls (106) are embedded in the bottom of the first sliding block (104), and the first balls (106) are in rolling contact with the base (1); a plurality of second balls (203) are embedded in the bottom of the placement plate (202), and the second balls (203) are in rolling contact with the bottom of the placement groove.

6. The laser cutting corner structure for BGA security board processing according to claim 1, characterized in that: A plurality of rubber protrusions (4) are fixedly connected to one side of the placement plate (202) adjacent to the limiting plate (303) at equal intervals in a circumference.

7. The laser cutting corner structure for BGA security board processing according to claim 1, characterized in that: The rubber protrusion (4) on the limiting plate (303) and the rubber protrusion (4) on the placing plate (202) fit together under the action of the first tensioning spring (302).

8. The laser cutting corner structure for BGA security board processing according to claim 1, characterized in that: A cylinder (7) is transversely fixedly connected to one side of the lifting plate (2), a piston (701) is slidably connected inside the cylinder (7), a connecting rod (703) is fixedly connected to the side of the piston (701) close to the placement plate (202), one end of the connecting rod (703) extending out of the cylinder (7) is fixedly connected to a movable plate (704), a grinding plate (705) is installed on the side of the movable plate (704) close to the placement plate (202), a second tensioning spring (702) is fixedly connected to the side of the piston (701) away from the connecting rod (703), and one end of the second tensioning spring (702) away from the piston (701) is fixedly connected to the cylinder (7).

9. The laser cutting corner structure for BGA security board processing according to claim 8, characterized in that: The upper end of the movable plate (704) is fixedly connected to an air jet pipe (706), and a side of the air jet pipe (706) close to the placement plate (202) is equidistantly connected to a plurality of air jet nozzles (707), the air outlets of the air jet nozzles (707) are arranged facing downward, and the air jet pipe (706) is connected to the air outlet of the cylinder (7) via a connecting air pipe (708).

10. The laser cutting corner structure for BGA security board processing according to claim 1, characterized in that: A distance meter (204) is fixedly connected to the lifting plate (2), and a detection end of the distance meter (204) faces the fixed plate (3).

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